The number of concussions reported by coaches in Seattle public high schools has more than doubled since the Zackery Lystedt Law came into effect in 2009, University of Washington researchers report.
Concussions are common among middle-school girls who play soccer, and most continue to play with symptoms, according to a study by John W. O’ Kane, M.D., of the University of Washington Sports Medicine Clinic, Seattle, and colleagues.
